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Alborosie
3 years ago
10

What is the mass of water that results from combining 2.0 g of hydrogen with 16.0 g of oxygen?

Chemistry
1 answer:
Feliz [49]3 years ago
4 0
C. 18.0g. all you really have to do is add both of them together and you get your answer.

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a compound with a molar mass of about 42g/mol contains 85.7% carbon and 14.3% hydrogen by mass. Write the Lewis structure for a
Svetlanka [38]

Answer:

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4 0
3 years ago
Carbon-carbon bonds form the ""backbone"" of nearly every organic and biological molecule. The average bond energy of the C¬C bo
qwelly [4]

1.17 × 10¹⁵ s⁻¹ is the frequency and the wavelength is 3.43 × 10⁻⁷m of the least energetic photon that can break an average C - C bond.

WHAT IS CARBON BACKBONE ?

The carbon backbone is also called the carbon skeleton. All organic compounds are made up of carbon-carbon bonds, creating a carbon skeleton or backbone in the compounds.

Carbon Skeleton Structure :

The carbon skeleton structures consist of bending lines, periodically other elements are written in as well. The carbon skeleton characteristics that change the overall structure includes:

  • Length of carbon chain (the longer it is the more zig-zags are drawn).
  • Shape of the carbon chain (branches, rings, etc. all change the shape of the skeleton).
  • Location of attached functional groups, they need to be put onto the correct point in the skeleton.
  • Any double or triple bonds that are present, particularly as triple bonds change the shape of the skeleton.

<h3>What is wavelength?</h3>

Forms of electromagnetic radiation like radio waves, light waves or infrared (heat) waves make characteristic patterns as they travel through space. Each wave has a certain shape and length. The distance between peaks (high points) is called wavelength.

Step 1 :

Here we have to calculate the frequency and wavelength of the least energetic photon that can break an average C - C bond and have to find out in what region of the electromagnetic spectrum is this radiation.

Bond energy of C - C = 347 kJ

It is known that E = hv

           ⇒ mu = \frac{E}{h}

Where, E is the energy = 347kJ

            h is the planck's constant = 6.626 * 10^{-34}J.s

            v is the frequency

Now substituting the values, frequency can be calculated as,

             ⇒ v = \frac{E}{h} = \frac{347kJ/1kJ * mol/6.022 * 10^{23}}{6.626 * 10^{-34}J.s}

                             ≈ 8.70 × 10¹⁴ s⁻¹ .

Formula of Wavelength :

              \lambda = \frac{hc}{E}

Where, λ = wavelength

            h = 6.6 × 10⁻³⁴

            c = 3 × 10⁸

            E = bond energy

Now substituting the values, wavelength can be calculated as,

\lambda = \frac{hc}{E} = \frac{6.6 * 10^{-34} * 3 * 10^{8} * 6.023 * 10^{23}}{347 * 10^{3}} = \frac{119.255 * 10^{-34} * 10^{31} * 10^{-3}}{347} = 0.343 * 10^{-6} = 3.43*10^{-7} m

Thus, from the above conclusion we can say that 1.17 × 10¹⁵ s⁻¹ is the frequency and the wavelength is 3.43 × 10⁻⁷ m of the least energetic photon that can break an average C - C bond.

Learn more about the wavelength and frequency here :

brainly.com/question/6297363

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6 0
1 year ago
Calculate the number of moles in 2.67 g of carbon trihydride
Scorpion4ik [409]

Answer:0.178 moles

Explanation: carbon trihydride seems to be an unusual name for the methyl group CH3–

ionic wt 15

moles = 2.67/15 = 0.178

8 0
3 years ago
How many moles are in 25 grams of HF
sergey [27]
Using this equation, we can take 25/(1.0 + 19) and find that it is equal to 1.25 moles.
5 0
3 years ago
Read 2 more answers
Which statements are consistent with Dalton"s atomic theory as it was originally stated? Why? a. Sulfur and oxygen atoms have th
Vlad [161]

The question is incomplete, the complete question is:

Which statements are consistent with Dalton's atomic theory as it was originally stated? Why?

a. Sulfur and oxygen atoms have the same mass.

b. All cobalt atoms are identical.

c. Potassium and chlorine atoms combine in a 1:1 ratio to form potassium chloride.

d. Lead atoms can be converted into gold.

<u>Answer: </u>The correct options are b) and c).

<u>Explanation:</u>

Some of the postulates of Dalton's atomic theory are:

  • All matter is made of very tiny particles called atoms that participate in chemical reactions
  • Atoms are indivisible particles that cannot be created or destroyed in a chemical reaction
  • Atoms of a given element are identical in mass and chemical properties
  • Atoms of different elements have different masses and chemical properties.
  • Atoms combine in the ratio of small whole numbers to form compounds.
  • The relative number and kinds of atoms are constant in a given compound.

For the given options:

<u>For a:</u>

The statement is inconsistent with the theory as no two elements can have the same mass. Only atoms of the same element can have the same mass.

  • <u>For b:</u>

This is consistent with the theory as atoms of the same element are identical.

  • <u>For c: </u>

This is consistent with the theory as atoms combine in a simple whole number ratio.

  • <u>For d:</u>

The statement is inconsistent with the theory as atoms of one element cannot be changed to atoms of other element.

Hence, the correct options are b) and c).

5 0
3 years ago
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